On January 4, 1972, Hewlett-Packard announced the HP-35, world's first scientific calculator small enough to fit in a pocket - more precisely, Bill He.. Read more
RPN-45 SD is a complete simulation of the scientific hand-held calculator HP-45 from 1973. Powerful enhancements turn the calculator into an amazingly useful tool for the 21st century. Features: • P.. Read more
RPN-70 SD is a complete simulation of the financial hand-held calculator HP-70 from 1974. It handles loan amortization, saving plans, depreciation, and much more with ease. What users said: "Looks g.. Read more
i41CX+ is an advanced programmable and expandable RPN scientific calculator with a virtual thermal printer/plotter and workstation-class CAS capabilities that is far beyond a mere replica of the origi.. Read more
This calculator allows you to easily handle all the calculations necessary for everyday life with a single application. A free calculator app with a clean interface and practical functions! List of c.. Read more
Vintage-45 is a complete simulation of Hewlett-Packard's scientific hand-held calculator HP-45 from 1973. Processing times and behavior have been carefully modelled after the original. Even the "secre.. Read more
RPN-55 SD is the first photo-realistic simulation for the iPhone of Hewlett-Packard's low-cost alternative to the famous HP-65 programmable scientific calculator. Produced from 1975 through 1977, it w.. Read more
World's first pocket computer! Now running on your iPhone. RPN-65 SD is the iPhone version of RPN-65 Pro, the first complete simulation of Hewlett-Packard's stunning HP-65 programmable calculator for.. Read more
All-in-one Calculator is a free calculator app for iPhone and iPad featuring over 40+ calculators and unit converters categorized under finance, health, date & time, construction, shopping and everyda.. Read more
A dream calculator of the 70's, priced at $1,900 in today's dollars, now on your iPad! RPN-67 Pro is the first complete simulation of Hewlett-Packard's legendary HP-67 programmable calculator for iOS.. Read more
i41CX is the same powerful advanced programmable RPN scientific calculator as the highly acclaimed i41CX+ but without the latter’s incredibly advanced capabilities such as the printer, expansion, CAS,.. Read more